Max Biaggi admits he is unsure as to how competitive he will be come race day at Silverstone after struggling to get the Aprilia RSV-4 working over the 'roughest' parts of the circuit.

The championship leader can put himself into an even stronger position in his quest for the World Superbike title with two good results at Silverstone, but he is yet to show front running pace this weekend.

Indeed, Biaggi would only scrape into the Superpole shootout by a tenth of a second, even if he did place a respectable sixth during the deciding session.

Hoping the conditions turn for the races, Biaggi is looking for way to handle the circuit's bumps better.

"We still have some problems, especially in the section where the asphalt is the roughest. Lap performance is in fact conditioned by these difficulties, but tomorrow over the long distance the dynamics could change.

"We expect two hard races, hoping that the weather gives us a hand although anything is to be expected here in England. The home riders are doing very well - we are still lacking something in order to be quick. I hope that my team can put me into some better conditions tomorrow."